Iran has begun its 25-year countdown to Israel’s destruction, preferably at its own hands.

Iran unveiled a digital clock in Tehran’s center counting down the days to what it says will be the destruction of Israel in 2040.

The event took place as part of the annual al-Quds Day celebration, during which millions of Iranians marched under the banner, “Death to Israel, Death to America.”

The timeframe appears to stem from comments made in 2015 by Iran’s Supreme Leader, Ayatollah Ali Khamenei, who vowed there will be “nothing” left of Israel by the year 2040, the UK’s Independent reported.

In September 2015, Khamenei proclaimed, “You [Israelis] will not see the coming 25 years and, God willing, there will not be something named the Zionist regime in next 25 years.”